Data - Winters' Method
main topic      

Your time series must be in one numeric column.

The time series cannot  include any missing values. If you have missing values, you may want to provide estimates of the missing values. If you:

·    Have seasonal data, estimate the missing values as the fitted values from the decomposition procedure. Replace the missing values in the series with the corresponding fitted values computed by Decomposition.

·    Do not have seasonal data, estimate the missing values as the fitted values from the moving average procedure. Replace the missing value with the fitted value computed by Moving Average.